To obtain the anti-vibration performance and anti-vibration design method of the spring bearing for vertical vibration isolation of large facilities

taking the horizontal displacement limitation situation of the cover and the vertical force as the basic parameter

the pseudo-static test of the horizontal repeated load and horizontal displacement of the spring isolation bearing of 10 specimens of 100 kN and 300 kN was completed

and hysteresis curve considering the influence of vertical load was obtained. The hysteresis relationship was linear elastic relationship under the initial small displacement

and the influence of vertical compression on the single-circle limit lateral displacement was negligible.After a large displacement

the hysteresis curve showedcertain energy consumption due to the limitation of the cover plate.When the cover plate hadno displacement limitation

the cumulative effect of vertical compression and horizontal deformation can cause irreversible plastic deformation of the local spring

and its energy consumption capacity and limit lateral displacement ability were large. Based on the test results

the methods for determining the elastic stiffness and elastic deformation limit of two types of spring isolation bearings were proposed. The suggestion was madethat the elastic deformation of the spring vibration isolating support should be combined with vertical deformation under the influence of rare earthquakes. The research results can provide references for seismic performance evaluation and seismic design of large-scale facilities such as large anechoic chambers or semi-anechoic chambers with vertical vibration isolators.